Rail for an architectural covering



FIG. 1 is an isometric view of a rail for an architectural covering in accordance with the present design.

FIG. 2 is a front elevational view thereof.

FIG. 3 is a rear elevational view thereof.

FIG. 4 is a right side elevational view thereof.

FIG. 5 is a left side elevational view thereof.

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The dash-dash broken lines illustrate features that form no part of the claimed design. The dash-dot-dash broken line defines a boundary of the claimed design and is not an ornamental part of the design itself. 

CLAIM We claim the ornamental design for a rail for an architectural covering, as shown and described. 